3-Wire Explosion Proof Transmitter
Features
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Electrochemical, Infrared or catalytic bead sensors
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Wire powered (3-Wire), 12 to 35 VDC operating voltage
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Operating temperature range -40°C to +60°C
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LCD display with LED back-light
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3 Push-button interface (ADD, MENU, SUB)
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Non-intrusive buttons using magnetic wand
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2 Individually configurable alarms
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2 Front panel LED indicators (amber and red)
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2 Optional fully programmable alarm relays (dry contacts)
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Output options: 4-20mA (3-wire) analog, RS-485 Modbus, both standard Industry Applications
Description
The T3A Series Gas Detector ambient air hazardous gas detector is a versatile assembly that uses an electrochemical, infrared, catalytic bead sensor element to detect a variety of gases. Wired power (12 to 35 VDC) with 4-20 mA analog and RS-485 Modbus outputs standard. Magnetic switches allow for non-intrusive calibration while in the field as well as full system settings and diagnostics.
The T3A represents the latest leading edge technology in fixed gas detection today.
Sensor Options
Gas Type | Range | T90 | Hazard Classification |
LEL Catalytic | 0 – 100% (0-5% Vol.) | < 90 sec. | Class 1, Div 1 |
CL2 | 0 – 10 ppm | < 60 sec. | Class 1, Div 2 |
CLO2 | 0 – 1 ppm | < 120 sec. | Class 1, Div 2 |
CO | 0 – 300 ppm | < 30 sec. | Class 1, Div 1 |
CO2 | 0 – 5% vol. | < 30 sec. | Class 1, Div 1 |
H2S | 0 – 100 ppm | < 30 sec. | Class 1, Div 1 |
H2S 2K | 0 – 2000 ppm | < 25 sec. | Class 1, Div 1 |
HCL | 0 – 30 ppm | < 300 sec. | Class 1, Div 2 |
HCN | 0 – 30 ppm | < 70 sec. | Class 1, Div 2 |
HF | 0 – 10 ppm | < 90 sec. | Class 1, Div 2 |
LEL-IR | 0 – 100% (0-5% Vol.) | < 30 sec. | Class 1, Div 1 |
LEL-IR-HC | 0 – 100% LEL | < 30 sec. | Class 1, Div 1 |
NH3 | 0 – 100 ppm | < 90 sec. | Class 1, Div 2 |
NH3 300 | 0 – 300 ppm | < 120 sec. | Class 1, Div 2 |
NH3 A | 0 – 1000 ppm | < 120 sec. | Class 1, Div 2 |
NO2 | 0 – 20 ppm | < 25 sec. | Class 1, Div 2 |
O2 | 0 – 25 Vol. | < 15 sec. | Class 1, Div 1 |
PH3 | 0 – 5 ppm | < 30 sec. | Class 1, Div 2 |
SO2 | 0 – 20 ppm | < 35 sec. |
Class 1, Div 1 |
Specifications
Sensor Type | Electrochemical, infrared, catalytic bead | |
Operating Voltage | Wired power (3-Wire) 12 to 35 VDC | |
Power Draw | 2 Watts maximum | |
Protection | Power electromagnetic interference (EMI) filter
4-20 mA surge suppression RS-485 surge suppression |
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Display Screen | 102×64 Resolution graphical LCD screen transflective (sunlight readable) with white LED backlight | |
Interface | 3 Push-buttons (MENU, ADD and SUB)
3 Magnetic non-intrusive switches for calibration |
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Customizable Settings | 2 Individual-configurable alarm LED/relay set-points | |
Temperature Range | -40°C to +60°C (-40°F to +140°F) | |
Output (digital) | RS-485 modbus | |
Wired (Analog) Output | 4-20 mA (3-Wire)
Fault terminal, wet relay contact. Has it’s own power. Optional 2 dry-contact relays with replaceable 4 amp fuses. |
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Product Dimensions | 5.5 in, L x 6 in. W x 7 in. H (8 in. W x 17 in. H Max. dimensions with attachments) | |
Total Weight | 6 lbs. | |
Remote Sensor Kit
(Optional Additional Feature) |
Remote sensor kit with enclosure (5 pin)
• Electrochemical sensor max. length: 250 feet • Infrared sensor max. length: 40 feet • Catalytic bead sensor max. length: 15 feet |
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Hazardous Location
Approvals |
Main Enclosure | Certified explosion / flame proof CQPSUS
Class I, Division 1 & 2, Groups B, C & D Nema 3, 4, 4X, 7 (B, C, D) 9 (E, F, G) Temp.= -20°C to +60°C |
Sensor Housing | Certified explosion / flame proof CQPSUS
Class I, Division 1 & 2, Groups B, C & D Temp.= -40°C to +60°C Note: Certification only applies to some gases. Toxic gases not certified for Div. 1 locations are suitable for Div. 2 applications but have no third party approval. |
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Controllers | Controllers compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410A, Beacon 800, and MC-6400 | |
Warranty | 1-Year warranty for electronics and sensor |